Edit File by line

[0] Fix | Delete

// Use of this source code is governed by a BSD-style

[1] Fix | Delete

// license that can be found in the LICENSE file.

[2] Fix | Delete

[3] Fix | Delete

// FIXED_FRAME defines the size of the fixed part of a stack frame. A stack

[4] Fix | Delete

// frame looks like this:

[5] Fix | Delete

[6] Fix | Delete

// +---------------------+

[7] Fix | Delete

// | local variable area |

[8] Fix | Delete

// +---------------------+

[9] Fix | Delete

// | argument area |

[10] Fix | Delete

// +---------------------+ <- R1+FIXED_FRAME

[11] Fix | Delete

// | fixed area |

[12] Fix | Delete

// +---------------------+ <- R1

[13] Fix | Delete

[14] Fix | Delete

// So a function that sets up a stack frame at all uses as least FIXED_FRAME

[15] Fix | Delete

// bytes of stack. This mostly affects assembly that calls other functions

[16] Fix | Delete

// with arguments (the arguments should be stored at FIXED_FRAME+0(R1),

[17] Fix | Delete

// FIXED_FRAME+8(R1) etc) and some other low-level places.

[18] Fix | Delete

[19] Fix | Delete

// The reason for using a constant is to make supporting PIC easier (although

[20] Fix | Delete

// we only support PIC on ppc64le which has a minimum 32 bytes of stack frame,

[21] Fix | Delete

// and currently always use that much, PIC on ppc64 would need to use 48).

[22] Fix | Delete

[23] Fix | Delete

#define FIXED_FRAME 32

[24] Fix | Delete

[25] Fix | Delete

// aix/ppc64 uses XCOFF which uses function descriptors.

[26] Fix | Delete

// AIX cannot perform the TOC relocation in a text section.

[27] Fix | Delete

// Therefore, these descriptors must live in a data section.

[28] Fix | Delete

#ifdef GOOS_aix

[29] Fix | Delete

#ifdef GOARCH_ppc64

[30] Fix | Delete

#define GO_PPC64X_HAS_FUNCDESC

[31] Fix | Delete

#define DEFINE_PPC64X_FUNCDESC(funcname, localfuncname) \

[32] Fix | Delete

DATA funcname+0(SB)/8, $localfuncname(SB) \

[33] Fix | Delete

DATA funcname+8(SB)/8, $TOC(SB) \

[34] Fix | Delete

DATA funcname+16(SB)/8, $0 \

[35] Fix | Delete

GLOBL funcname(SB), NOPTR, $24

[36] Fix | Delete

#endif

[37] Fix | Delete

#endif

[38] Fix | Delete

[39] Fix | Delete

// linux/ppc64 uses ELFv1 which uses function descriptors.

[40] Fix | Delete

// These must also look like ABI0 functions on linux/ppc64

[41] Fix | Delete

// to work with abi.FuncPCABI0(sigtramp) in os_linux.go.

[42] Fix | Delete

// Only static codegen is supported on linux/ppc64, so TOC

[43] Fix | Delete

// is not needed.

[44] Fix | Delete

#ifdef GOOS_linux

[45] Fix | Delete

#ifdef GOARCH_ppc64

[46] Fix | Delete

#define GO_PPC64X_HAS_FUNCDESC

[47] Fix | Delete

#define DEFINE_PPC64X_FUNCDESC(funcname, localfuncname) \

[48] Fix | Delete

TEXT funcname(SB),NOSPLIT|NOFRAME,$0 \

[49] Fix | Delete

DWORD $localfuncname(SB) \

[50] Fix | Delete

DWORD $0 \

[51] Fix | Delete

DWORD $0

[52] Fix | Delete

#endif

[53] Fix | Delete

#endif

[54] Fix | Delete

[55] Fix | Delete